Origin of hysteresisModern Latin ; from Classical Greek hysterēsis, a deficiency ; from hysterein, to be behind, come short ; from hysteros, later, behind ; from Indo-European an unverified form udteros, comparative of base an unverified form ud-, up from source out
Origin of hysteresisGreek husterēsis, a shortcoming, from husterein, to come late, from husteros, late; see ud- in Indo-European roots.
- A property of a system such that an output value is not a strict function of the corresponding input, but also incorporates some lag, delay, or history dependence, and in particular when the response for a decrease in the input variable is different from the response for an increase. For example, a thermostat with a nominal setpoint of 75° might switch the controlled heat source on when the temperature drops below 74°, and off when it rises above 76°.
Coined by Sir James Alfred Ewing from Ancient Greek ὑστέρησις (husterēsis, “shortcoming”), from ὑστερέω (hustereō, “I am late, fall short”), from ὕστερος (husteros, “later”).
hysteresis - Computer Definition
The lag between making a change, such as increasing or decreasing power, and the response or effect of that change. It typically refers to turn-on and turn-off points in electrical, electronic and mechanical systems. For example, if a thermostat set for 70 degrees turns on when the temperature reaches 68 and turns off at 72, the hysteresis is the range from 68 to 72.